The suspect was identified as 28-year-old Dicarlo Bennett, according to the sources.

Public records show that Bennett lived in South Los Angeles. He was arrested Tuesday in Paramount, the LAPD said.

A Facebook account registered to a Dicarlo Bennett said he studied at Santa Monica College and was a former ramp supervisor for Servisair, an airport contractor.

[Updated 10:34 p.m.: A law enforcement source confirmed that Bennett worked for Servisair.]

All three devices were found in areas off-limits to the public, leading LAPD Chief Charlie Beck and other officials to concentrate on airport workers -- particularly those with access to the tarmac.

"Whether you think this is a harmless prank or a way to disrupt operations at the airport, it won't matter," Beck said. "You will go to jail."

The first device -- a 20-ounce plastic bottle filled with dry ice -- was discovered about 7 p.m. Sunday after it exploded in an employee-only restroom at Terminal 2, authorities said. No injuries were reported, but operations in the terminal were suspended and some flights delayed as the LAPD bomb squad cleared the scene.

More than 24 hours later, the LAPD was again notified after an airport employee found a plastic bottle that was fizzing -- but had not exploded — on the tarmac outside the Tom Bradley International Terminal, officials said.

The employee told police he had cleaned up a similar device on Sunday that had apparently exploded in the same area, LAPD Deputy Chief Michael Downing said. The employee said it wasn't until he spotted the bottle Monday that he realized what it was.

Another potential dry-ice bomb -- initially thought to be a fourth device -- was found on the tarmac Monday, but it was determined to be trash, police said. LAPD officials initially offered conflicting reports about the number of devices found.